Envelop-fastener.



R. DUNMYER.

ENVELOP PASTENER.

APPLICATION FILED MAR.19, 1913.

1 95,562. Patented May 5, 1914.

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COLUMBIA PLANOGRAPH c0.. WASHINGTON. Dv c.

TTTTED S RUDOLPH DUNMYER, OF NEW BRIGHTON, PENNSYLVANIA.

ENVELOP-FASTENER.

Specification of Letters Patent.

Patented May 5, 191a.

Applieati on filed March 19, 1913. Serial No. 755,538.

To all whom it may concern:

Be it known that I, RUDOLPH DUNMYER, a citizen of the United States,residing at New Brighton, in the county of Beaver and State ofPennsylvania, have invented new and useful Improvements in Enveloplasteners, of which the following is a specification.

Fly invention relates to fasteners for envelops, packages, boxes, andthe like. The object thereof is to provide a novel means for sealingsuch articles and preventing the unsealing of the same without thetearing, breaking, or cutting of the said articles.

My invention is particularly adapted to sealed envelops. Envelops sealedwith mucilage can be unsealed and rescaled without leaving a sign bywhich the unsealing may be detected. With my fastener, the envelop mustbe mutilated before its contents can be removed.

Referring to the accompanying drawings, Figure lisarear view of anenvelop equipped with my fastener, the sealing flap being open. Fig. 2is a rear view of the inner member of the section by which the end andbottom flaps of the envelop are fastened together; Fig. 3, an edge viewof Fig. 2; Fig. A, an elevation of the outer member of the said section;Fig. 5, a rear view of the said section; Fig. 6, a central cross-sectionof Fig. 5; Fig. 7, an edge view of the section of the fastener which issecured to the upper, or sealing, flap; Fig. '8, a view of Fig. 7,looking toward the left; Fig. 9, a view of the two sections of myfastener with the parts just ready to interlock; and Fig. 10, a centralcross-section of a modification of Figs. 7 and 8.

On the drawings, 1 represents an envelop having the two end flaps 2 and3 and the bottom flap l secured together by one section of my fastener.The sealing flap 5 of the envelop is provided with the other section ofthe fastener. The first named section is composed of the two members 6and 7 and the other member is composed of a single section 8 in Figs. 6to 8, and of two sections in Fig. 10.

The member 6 is made from a concaved disk of sheet metal provided withthe fastening lugs 11 and 12. The member 7 comprises a metal disk havingthe central opening 13. The member 7 preferably fits in the concavity ofthe member 6 so that the outer face of the member 7 lies substantiallyflush with the periphery of the member 6, as

shown on Fig. 6, leaving the space'la between the members 6 and 7. Thelugs 11 are turned down upon the outer face of the member 7 so as tosecure the members 6 and 7 together, as a unit. The lugs 12 have theirends beveled and extending at right angles to the member 7 on that sideof the said member 7 on which the lugs 11 lie. With the parts arrangedas shown in Figs. 5 and 6, the lugs 12 are pushed from the inside of theenvelop through the overlapping portions of the flaps 2, 3, and 4:, andthen bent down on the outer face of the envelop, or flap 4, as shown onFigs. 1 and 9.

The section 8 is a concaved disk of sheet metal, having a pair of springcatches 15 having one end of each secured centrally in any rigid mannerto the concave side of the said section. I have shown the catches having their outer ends bent or curved out-.

wardly away from each other and then backwardly so as to form camsurfaces,

shown at 16, which are so arranged that the cams will engage theopposite sides of the opening 13 and force the catches toward eachother, as shown in full lines on Fig. 9. lVhen the cam-ends of thecatches pass entirely through the opening 13, the catches spring apartto the dotted line position so that their recurved ends catch over theinner face of the member 7 as shown in dotted lines on Fig. 9.

The periphery of the member 8 is provided with the lugs 17 havingbeveled ends. The lugs 17 are pushed through the fiap 5 from the outerface thereof so that the lugs 17 and the catches 15 project through theflap. The lugs 17 are bent down on the flap as shown on Fig. 1 in orderto secure the flap 5 and the member 8 together.

The envelop 1 is sealed by bringing the flap 5 down on the back of theenvelop and then pushing the fastener sections together so that thespring catches 15 will pass entirely through the opening 13 and theregistering holes in the flaps 2, 3, and 4, until the catch interlockswith the'member 7 in the manner already described. I

In Fig. 10, the member 8 contains a concave member 18 nested therein,and secured therein by the lugs 19 carried by the member 8 and bent downon the member 18. The member 18 supports the spring catches 15 the sameasthe member 8 in Figs. 7 and 8 is shown supporting the spring catches.

It is evident that the lugs 11 might be omitted, but I prefer to usethem because they enable me to assemble the members 6 and 7 before theirshipment or use Without liability of their becoming separated. In somecases all or some of the said lugs may be omitted, because the springcatches alone will hold the flaps together. I

I reserve the right to cover such modifications of my invention as comewithin the scope of the appended claim when interpreted liberally.

I claim The combination With two members to be fastened together, of atwo-part fastener, one part comprising a dished body and a series oflugs thereon, and a cover for the body, having an opening, some of thesaid lugs being bent down on the outer face of the cover and others ofthe said lugs extending through one of the said members and bent downthereon, and the other part comprising a body secured to the othermember and provided With a pair of spring catches arranged to passthrough the said opening and automatically interlock with the rear faceof the cover by reason of their resiliency.

Signed at Pittsburgh, Pa, this Sth day of March, 1913.

RUDOLPH DUN MYER.

Witnesses:

F. N. BARBER, ANNA R. BEATTY.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

